Rhitymna macilenta, Quan, Dan & Liu, Jie, 2012

Quan, Dan & Liu, Jie, 2012, Two new Rhitymna species (Araneae: Sparassidae) from Hainan Island, China, Zootaxa 3200, pp. 61-68 : 62

Rhitymna macilenta sp. nov.

Figs 1–2 , 5

Type material: Holotype: male, Mt. Bawangling (19º7.158’N, 109º9.097’E), Hainan Island, China, 24 April 2009, Guo Tang leg. ( IZCAS). Paratypes: 1 male, Mt. Jianfengling (18º33.352’N, 108º50.259’E), Hainan Island, China, 15 April 2009, Guo Tang leg. ( IZCAS); 1 male, Mt. Wuzhi (18º53.835’N, 109º41.889’E), Hainan Island, China, 9 April 2009, Guo Tang leg. ( IZCAS).

Etymology. The specific name is derived from the Latin adjective macilentus, -a, -um, meaning “macilent”, referring to the gracile body and legs of this spider; adjective.

Diagnosis. This new species can be distinguished from other Rhitymna species by the pale body and the small tegulum (only 1/3 the length of cymbium). Moreover, in ventral view parts of subtegulum are clearly visible prolatero-proximally ( Figs 1–2 ).

Description. Male (holotype): Measurements (in mm): PL 3.7, PW 2.9, AW 1.7, PH 0.8, OL 4.3, OW 2.3. Eyes: AME 0.24, ALE 0.20, PME 0.17, PLE 0.21, AME–AME 0.11, AME–ALE 0.09, PME–PME 0.38, PME– PLE 0.19, AME–PME 0.21, ALE–PLE 0.14, CH AME 0.04, CH ALE 0.02. Leg and palp measurements: Pp 6.5 (2.2, 0.8, 1.4, -, 2.1), I 29.8 (7.6, 1.3, 9.2, 9.7, 2.0), II 33.1 (8.5, 1.4, 10.3, 11.0, 1.9), III 16.1 (4.8, 1.0, 4.3, 4.8, 1.2), IV 25.8 (.6.8, 1.3, 8.4, 8.2, 1.1). Leg formula: II-I-IV-III. Spination: Pp 210, 0 0 0, 1121; Fe I–II 232, III 131, IV 231; Pa I–IV 000; Ti I–II 0 408, III–IV 2224; Mt I–IV 2024. Chelicerae with 3 anterior teeth and 5 posterior teeth, with the proximal tooth of the posterior cheliceral teeth being the largest. Color: Prosoma with light yellow color, opisthosoma whitish. Anterior row of eyes located in a dark black band. Legs very long with black spine patches. Dorsal opisthosoma with two pairs of white patches laterally, with scattered pink spots medially in the holotype (without spots in the paratyes) ( Fig. 2A ).

Palp as in diagnosis. Tegulum small, only 1/3 the length of cymbium, with two apophyses located laterally. Parts of subtegulum are clearly visible prolatero-proximally in ventral view. Embolus arising in a 9-o’clock-position on the tegulum, with a distinct prolateral embolic indentation, without embolic apophysis, with a short and sickleshaped distal end. Sperm duct hardly visible in a ventral view. RTA simple, apically tapered in lateral view, with a small apophysis basally. Cymbium slightly longer than tibia, with a retrolaterally indented tip ( Figs 1 , 2B–E ).

Female: Unknown.

Distribution. China (Hainan Island) ( Fig. 5 ).

Figures

FIGURE 5. Collection localities of Rhitymna species on Hainan Island.

FIGURES 1 A – C. Rhitymna macilenta sp. nov. holotype male, left palp. A Prolateral view; B Ventral view; C Retrolateral view. Abbreviations: E—embolus; EI—embolus indentation; RTA—retrolateral tibial apophysis; T—tegulum. Scale bars: 0.5 mm.

FIGURES 2 A – E. Rhitymna macilenta sp. nov. male holotype. A body, dorsal view; B – E Left palp (B prolateral, C ventral, D retrolateral, E dorsal). Abbreviations: E—embolus; EI—embolus indentation; RTA—retrolateral tibial apophysis; T—tegulum. Scale bars: A = 1 mm, B – E = 0.5 mm.